what are the characteristics of fungi? most multicellular (except yeast: unicellular) eukaryotes –...
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What are the characteristics of What are the characteristics of Fungi?Fungi?
Most Multicellular (except yeast: unicellular)
Eukaryotes – cells contain a nucleus
Heterotrophic – are consumers like animals (eat food)
Most are decomposers (recycle)
Cell walls composed of chitin
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Structures of FungiStructures of Fungi
Body made of mycelium (grows below ground)
Fruiting body- part that reproduces (grows above ground)
Mycelium and fruiting body made of hyphae- string-like structures
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Mycelium
Fruiting body
Hyphae
The Structure of a Mushroom
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III. Growth and ReproductionIII. Growth and Reproduction
Most Fungi develop from a spore into a hyphae, then a mycelium
Spores are microscopic- they are everywhere!1. Spores are easily carried by wind or animals
When conditions are favorable a fruiting body can grow overnight!
1. Fungi like warm, moist environments
Can reproduce sexually or asexually1. Sexually -Involves 2 mating types (+) and (-)
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FERTILIZATION
MEIOSIS
HYPHAE FUSE
Fruiting body (N+N)
Button
+ Mating type (N)
- Mating type (N)
Basidiospores(N)
Zygote (2N)
Basidia (N + N)
Gills lined with basidia
GillsStalk
Base
Cap
Haploid
Diploid
Figure 21-8 The Life Cycle of a Basidiomycete
Page 534Production of sex cells
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How are Fungi classified?How are Fungi classified?
Divided into major groups based on structure and reproduction
Zygomycetes- The common molds ex: black bread mold
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Zygomycetes http://mercury.bio.uaf.edu/courses/biol105/Lectures/Section4/4b4d1_31_06.jpg
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How are Fungi classified?How are Fungi classified?
Divided into major groups based on structure and reproduction
Zygomycetes- The common molds ex: black bread mold
Ascomycota- The sac fungi ex: yeast
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http://mercury.bio.uaf.edu/courses/biol105/Lectures/Section4/4b4d1_31_06.jpg
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How are Fungi classified?How are Fungi classified?
Divided into major groups based on structure and reproduction
Zygomycetes- The common molds ex: black bread mold
Ascomycota- The sac fungi ex: yeastBasidiomycota- The club fungi ex: mushroom
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Basidiomycota http://mercury.bio.uaf.edu/courses/biol105/Lectures/Section4/4b4d1_31_06.jpg
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Basidiomycota http://mercury.bio.uaf.edu/courses/biol105/Lectures/Section4/4b4d1_31_06.jpg
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How are Fungi classified?How are Fungi classified?
Divided into major groups based on structure and reproduction
Zygomycetes- The common molds ex: black bread mold
Ascomycota- The sac fungi ex: yeast
Basidiomycota- The club fungi ex: mushroom
Deutermycota- The imperfect fungi (no known sexual life cycle) ex: Penicillium
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Deutermycota: Deutermycota: Ex: PenecilliumEx: Penecillium
Imperfect fungi
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Ecology of FungiEcology of Fungi
Decomposers – recycle nutrients
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During the Revolutionary WarDuring the Revolutionary War
The British lost more ships to
fungal rot than to
enemy fire
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Ecology of FungiEcology of Fungi
Pioneer species- important for soil formation
lichen- break down rock into soil; it is symbiotic relationship between a fungus and a photosynthetic organism
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Densely packed hyphae
Layer of algae/ cyanobacteria
Loosely packed hyphae
Densely packed hyphae
Lichen Structure
Fungus provides protection
Algae provide food
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Lichen is a pioneer species and help with the formation of soil.
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The acids in the lichens break down the rock over time and these particles of rock mix with dead lichen to form soil.
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Ecology of FungiEcology of Fungi
Pioneer species- important for soil formation; break down rock into soillichen- very important pioneer species; it is
symbiotic relationship between a fungus and a photosynthetic organism
Mycorrhizae- symbiotic relationship between plants and fungus; plant gets water and nutrients and fungus gets a place to live on the roots of the plant
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Ecology of FungiEcology of Fungi
Mycorrhizae- symbiotic relationship between plants and fungus
Important in Baking and Brewing -making bread and other products
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Eaten as foods
Truffles
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Truffle
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Blue Cheese: Penicillium roquefortii is used in the manufacture of blue cheeses e.g. Roquefort, Gorgonzola, Stilton, Danish Blue etc. During the fermentation process the fungus spores are injected into the curd. Growth of the fungus imparts a pleasant tang to the final product. By the way, the blue in the blue-cheese is caused by the pigment in the spores (conidia) of the fungus. So, when you eat blue cheese you are consuming spores by the million.
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Eaten as foods
Responsible for crop damage (as much as 50% in tropical areas)
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Eaten as foods
Responsible for crop damage (as much as 50% in tropical areas)
Cause human diseases and illnesses
athletes foot
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Eaten as foods
Responsible for crop damage (as much as 50% in tropical areas)
Cause human diseases and illnesses
athletes foot
ringworm
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Eaten as foods
Responsible for crop damage (as much as 50% in tropical areas)
Cause human diseases and illnesses
athletes foot
ringworm
thrush
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Used in medicine production: penicillin, high blood pressure, pain medications
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